Nice job! It felt pretty well balanced overall, I was able to win after a couple of tries. Unfortunately, the use of emoji characters as sprites had some... unexpected results in the Brave browser.
I'd make a comment here, but I actually used emojis for the volume buttons in my game and had the exact same issue! I guess the font really matters even inside a game - an interesting lesson I didn't think of before. I was confused by Granny's friend until I looked at your screenshots :)
Does the game give you a random number of coins to look for? I lost the first few times, but when I won, I only found two coins. I'm not sure if it was going easy on me, or if there is some randomness to the level generation.